Frequently wifi disconnects

[crunchthem]

I got 1-3 wifi disconnects every minute. After 1-2 sec the connections is established again. 2,4 or 5 ghz, WPA or WEP or none, doesn't matter. Also tried disabling play-services.
I'm on stock Android 8 with latest security patches. It's a brandnew phone.
Logcat is telling these errors. Anyone knows the reason for the disconnects?

this one is it in 4 out of 5 times

08-04 19:00:03.263 15061 15061 I wpa_supplicant: WEXT: Custom wireless event: 'TSMIE=0:0:0'
08-04 19:00:03.291 15061 15061 E wpa_supplicant: disconnect rssi= -78
08-04 19:00:03.292 15061 15061 I wpa_supplicant: wlan0: CTRL-EVENT-DISCONNECTED bssid=c4:04:15:3d:f1:7e reason=0 locally_generated=0 disconnect_rssi=78
08-04 19:00:03.302 15061 15061 E wpa_supplicant: nl80211: Failed to open /proc/sys/net/ipv4/conf/wlan0/drop_unicast_in_l2_multicast: No such file or directory
08-04 19:00:03.303 15061 15061 E wpa_supplicant: nl80211: Failed to set IPv4 unicast in multicast filter
08-04 19:00:03.309 15061 15061 E wpa_supplicant: eap_proxy: eap_proxy_notify_config
08-04 19:00:03.323 1636 2238 W WifiConfigManager: Looking up network with invalid networkId -1

this one is it in 1 out of 5 times

08-04 19:00:46.170 971 15060 E WifiHAL : Received fatal event, sending alert
08-04 19:00:47.128 1199 1199 E wificond: Received error message: Math result not representable
08-04 19:00:47.128 1199 1199 E wificond: NL80211_CMD_GET_STATION failed
08-04 19:00:47.129 1636 2238 E WificondControl: Invalid signal poll result from wificond
08-04 19:00:47.129 1636 2238 W WifiConfigManager: Looking up network with invalid networkId -1

 

[pirast]

I have problems connecting with 802.1x networks only if the AP is from Cisco on my Moto X Play. The log messages are similar. Given that another Moto X Play does not show this issue, I think it is a hardware issue (might be the same for you). But convincing Motorola to repair it even though it is not easily reproducable is difficult.